Unarmored Defense. While the thug is wearing no armor and wielding no shield, its AC includes its Wisdom modifier.

Martial Arts. If the thug hits a creature with an unarmed strike they can force the target to drop one item they are holding (DC 12 Strength save to resist), fall prone (DC 12 Dexterity save to resist), or become stunned until the end of the thug’s next turn (DC 12 Constitution save to resist).

Multiattack. The thug attacks three times; these attacks can be unarmed strikes or three dart attacks.

Unarmed Strike. Melee Weapon Attack: +5 to hit, reach 5 ft., one target. Hit: 7 (1d8 + 3) bludgeoning damage. 

Dart. Ranged Weapon Attack: +5 to hit, range 20/60 ft., one target. Hit: 5 (1d4 + 3) piercing damage.

Deflect Missile. In response to being hit by a ranged weapon attack, the thug deflects the missile. The damage it takes from the attack is reduced by 1d10 + 6. If the damage is reduced to 0, the thug catches the missile if it’s small enough to hold in one hand and the thug has a hand free.